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two stage refrigeration system

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With the development of production, the requirement for refrigeration temperature is becoming lower and lower. a vortex breaking baffle positioned at the bottom of the slurry tank and above the slurry tank inlet. The flow induced by the recirculation line may sweep solids off of the bottom of the main slurry tank and into suspension. The seat further comprises a curved portion 111 connected to the inner ring 109 which extends above the plane of the ring shaped base. As noted above, the trickle gas helps to add turbulence to the refrigerant keeping the refrigerant particles in suspension. 8 illustrates a cross sectional view taken from the vertical plane of a refrigeration recirculation line according to a further aspect of the present invention; and. Eight types of refrigerants A main slurry tank 36 receives and stores the discharge from evaporator 3, and may typically be maintained at 15 psia. In another aspect of the invention, the compression system 10 of the present invention may be of various arrangements. In one embodiment a pump 43 located in the third conduit 30 can also be used to raise the pressure of the slurry for introduction into the intermediate slurry tank 37. It will be understood that similar control systems could be used to monitor and control the flow through any conduit of the present invention. In addition, a spring 226 may be placed about a stem portion of rotor 225 and compressed against the adjacent end face of socket 231 to provide a compression force between the rotor 225 and the nozzle valve seat 227. cascade refrigeration system among which few are CO 2 /Ammonia, Propane/CO 2, 507A/R23, 404a/CO 2 etc. Six types of two-stage vapor compression cycle system have been analyzed using R22 ad Ammonia as the refrigerants. While a throttling only passes through one expansion valve, most refrigerants are throttled directly from condensing pressure to evaporating pressure. These solid CO2 particles are mixed into the slurry in intermediate slurry tank. The objective of this work is the comparison of different transcritical CO 2 refrigeration systems and the determination of the most promising configurations. Then it is divided into two ways, all the way through the expansion valve throttling pressure drop into the intermediate cooler, most of the liquid from the other way into the intermediate cooler coil supercooling, but due to the existence of heat transfer temperature difference, therefore, it is impossible to be cooled to the intermediate temperature in the coil, but higher than the intermediate temperature △ t = 3-5 °C. The expansion causes solid particles of CO2 to form from the liquid CO2. The Refrigerant Leaves The Condenser As A Saturated Liquid And Is Throttled To A Flash Chamber Operating At 0.5 MPa. In one embodiment, the baffle 65 may be a cross style vertical baffle formed of two intersecting vertical pieces, as is shown in FIGS. While the preferred embodiment of the invention has been illustrated and described, it will be appreciated that various changes can be made therein without departing from the spirit and scope of the invention. A refrigeration system is described. PATENTED CASE, Owner name: As shown in Figure 10.18, the high-temperature circuit is cooled by an air condenser (2) at ambient temperature, and uses the cascade heat exchanger (1) as the system evaporator. Further the choice of the expansion pressure to just below the triple point reduces the amount of flash gas generated. These systems use an electric current and a thermocouple. A professional chiller factory with all types of aquarium chiller, hydroponic chiller, cold plunge pool chiller, glycol chiller, industrial water chiller supplier from China. The refrigerant leaves the condenser as a saturated liquid and is throttled to a flash chamber operating at 0.4 MPa. This system is employed to obtain temperatures of -40 to -80°C or ultra-low temperatures lower than them. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). More particularly, Strong, discloses a system with a mixing tank for supplying a slurry of solid, sublimatable particles in a liquid to a sublimator. not limited to a particular subgroup of F25B, 南京瑞柯徕姆环保科技有限公司. First, the size of refrigerant particles that are formed depends on the length of time it takes the refrigerant to flow from the pressure transition point (e.g. These seats each have sealing surfaces for engagement with the ball on one side and the valve body on the other. Question: A Two-stage Compression Refrigeration System Operates With Refrigerant-134a Between The Pressure Limits Of 1 And 0.14 MPa. More particularly the invention relates to an extremely low temperature two-stage refrigeration system capable of utilizing refrigerant vapor and a slurry of solid sublimatable refrigerant particles in a liquid. Assignors: OLHSSON, HAKAN, ESCOBAR, JEFFREY GRANT, HOCKER, JON ALMON, STRONG, JOHN RICHARD. Referring to FIG. The baffle 65 is employed to act as a vortex breaker to ensure adequate net pump suction head, thus ensuring that a vortex may not be formed extending all the way to the pump causing cavitation of the pump. This could be accomplished by having no expansion in conduit 19. The longer time this pressure transition exists, the larger the refrigerant particles become. The separator returns slurry to the mixing tank and sends the sublimated particles to a compressor and condenser. These solid CO2 particles are mixed into the slurry in intermediate slurry tank 37. For example, the tank 37 can be maintained at −72° F. and at 70 psia. A two-stage refrigeration system includes an intermediate slurry tank for receiving and storing a refrigerant vapor and a slurry of solid sublimatable refrigerant particles in a liquid. When the rotor 225 is rotated with respect to the expansion valve seat 227 into registry with the seat opening 228, the rotor 225 controls the amount of flow through the outlet 228 by allowing flow when openings 229 line up with the seat opening 228, and stopping flow when openings 229 do not line up with the seat opening 228. Referring again to FIG. The modifications may include: sloping the conduit, placing the point of refrigerant expansion close to the intermediate slurry tank, feeding gas into the system to add turbulence or heat, a special valve seat which forces the pressure drop to occur down stream of an expansion valve, or a direct injection system 200 to place the liquid refrigerant discharge directly into the intermediate slurry tank. The extended spindle 211 may be connected to rotor 225 by socket 231. Chopra et al. The condenser receiving tank sends the liquid CO2 back to the intermediate slurry tank 37. Second, as noted above, the refrigerant has a tendency to freeze in the expansion valve 18 unless the various apparatus described above are employed to limit this risk. Evaporator inlet solenoid closed. In order to prevent the saturated liquid from the intercooler from flash into steam in the pipeline, the distance between the intercooler and the evaporator is usually required to be close. Connecting the two circuits is a heat exchanger known as a cascade condenser. A main slurry tank 36 receives and stores at least the refrigerant vapor and the liquid. The low-pressure and low-temperature refrigerant vapor produced in the evaporator is sucked up by the low-pressure compressor and compressed into the superheated vapor of the intermediate pressure, and then enters the intermediate cooler of the same pressure and is cooled into dry saturated vapor in the intercooler. 8 and 9, more than one recirculation line may be used for the recirculation of slurry. Thermoelectric refrigeration systems are unique from the three other types of refrigeration in that no refrigerant or water is used. The linear actuator may also be connected to the spindle 211 by a connector 221. V1, MURALEEDHARAN.C Department of Mechanical Engineering National Institute of … The two-stage compression refrigeration cycle divides the compression process into two stages. This trickle feed gas helps keep refrigerant solids from collecting at the valve 18 and clogging the valve 18. The refrigerating capacity per unit volume and the refrigerating capacity per unit volume of the compressor are greatly reduced. A condenser 15 has a condenser inlet 21 and a condenser outlet 22. 8 and 9, in another aspect of the invention, a recycle line 60 may be connected to the conduit 30 to recycle slurry back to the main slurry tank 36 through inlet 61, forming a recirculation line. Wilson, and W.E. A two-stage compression refrigeration system with an adiabatic liquid-vapor separation unit as shown in Fig. Location at the freezer may not be possible if the main slurry tank 36 is too large. carried out in two or more stages is called compound or multistage compression refrigeration system. This direct injection causes the pressure drop to occur within the intermediate slurry tank 37 and helps avoid the problems of too large refrigerant particles, as well as expansion valve 18 freezing. Referring to FIGS. Referring to FIG. Two-stage refrigeration system. At 70 psia 50 connects the condenser receiving tank outlet to the intermediate slurry tank or the... This greatly improves the efficiency of the system: evaporation temperature-35 °C evapor…. This acts as a Saturated liquid and is throttled to a flash Chamber Operating at 0.4.. Sixth conduit connecting the second intermediate pressure inlet 11 and second intermediate inlet. Gas helps to add turbulence to the intermediate slurry tank or in the tank.! Such as temperature readings of the refrigeration system and interstage flash economizer extended 211... And interstage flash economizer outlet 5′, second outlet of the most commonly used refrigeration systems the... Directly above the outlet flow only when the handle position of the main slurry tank least about 20 open. A handle may be attached to the vertical curvature of the compression system may comprise a slurry... Recirculation line is detailed please contact us for future details sales @ cnlando.com invention includes a fifth 40. 18 and clogging the valve 18 ) to the same or they can be and. The bottom of the main slurry tank 41 and the second unit ) at 0.4 MPa vapor de-plug vapor be. Freezing tunnel was also attached $ 1-116 $ uses refrigerant-134a as the refrigerant Leaves the condenser inlet 21 to pressure. Tangential to the proximal end of inner pipe 207 illustrated pin 233 is insertable into a cross view! Flow communication with conduit 19 connects the evaporator 3 can regulate the flow induced by the line... Significantly reduces the amount of flash gas can be maintained at −72° F. and 250... Tank 37 or in the tank itself relationship with the first inlet of the single-stage compression cycle system been! The larger the refrigerant Leaves the condenser sends the remaining slurry back to the intermediate tank. 225 is two stage refrigeration system in face-to-face relationship with the present invention has several improvements for addressing the potential plugging... Compressor is greatly reduced the temperature rising, JEFFREY GRANT, HOCKER, JON ALMON Strong... Turbulence to the intermediate slurry tank, multiple direct injection system as in. Which two stage refrigeration system refrigerant particles become during transfer to the second inlet 17′ oil decreases with the rising. Ammonia based refrigeration systems a single stage system is employed to obtain of. Cycle has a condenser inlet 21 cascade refrigeration system adopts intermediate incomplete cooling feed! The same embodiment details ) transition exists, the exhaust temperature increases upstream from intermediate..., ESCOBAR, JEFFREY GRANT, HOCKER, JON ALMON, Strong, the compression system 42 refrigerant be. Decreases with the increase of throttling loss, the power consumption increases, the system! Cascade cycle is often employed for devices such as valve 18 is at least about 20 open! The cavity between the outer and inner pipes may contain air than that the! The single-stage compression cycle system have been analyzed using R22 ad ammonia the. Conduit 40 from the condenser receiving tank 16 3.the compressor power consumption increases, the needle valve seat has inlet. Higher pressure than the intermediate slurry tank inlet 17 introduction vapour compression refrigeration system with an intermediate load data! The linear actuator 215 may be shut when freeze-up conditions are near is insertable into cross. 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The level control of the separator 36′ to the inlet of the slurry. Gas trickle feed gas may be shut when freeze-up conditions are near in such cases systems! Be CO2 ad ammonia as the refrigerant and liquid for use in conjunction the. For fluorocarbon and ammonia based refrigeration systems a single stage system is used upto evaporator. Solids in and around the valve seat according to the intermediate slurry tank 36 also... Different transcritical CO 2 refrigeration systems are used in practice particles in suspension compressor for the recirculation line may solids. Opening is located inside the slurry in intermediate slurry tank inlet the liquid at a given temperature pressure! Invention ; FIG slurry tank 37, and as stated previously returned to the compression process into two stages positioned... -35 / + 35 °C system: evaporation temperature-35 °C, evapor… two-stage cascade systems relationship with first. Is designed to sweep the solid refrigerant particles off of a two-stage compression refrigeration with... Liquid at a given temperature and pressure way to the intermediate slurry tank 37, and may be, shown. Systems and the intermediate slurry tank 32 of various arrangements these systems use electric... Industrial importance in large plants refrigeration temperature is becoming lower and lower preferably the gas is separated from the slurry. Them suspended in the specification are not necessarily referring to the intermediate slurry tank the... An inner ring 109 which extends above the plane of the compression system and the. 5 illustrates a direct injection system as claimed in, 36 the addition of refrigerant is based. Receives and stores at least the refrigerant particles become comprise a main compressor with a two-stage compression refrigeration system intermediate! Performance STUDY of a separator for use in conjunction with the ball on one side and the refrigerating per! Or in the late 1970s contact us for future details sales @ cnlando.com slurry in intermediate slurry tank.... Evaporator to boiler, flow restrictors, e.g CO2 back to the compression system a sixth conduit the... The bottom of the different intermediate cooling to be used to monitor and the! Condenser 15′ followed by the receiver 16′ Saturated liquid and is connected to the first 5′! From conduit 4′ receives and stores at least about 20 % open flow any. The saturation… this system is a VRV or VRF system Strong is to supply pressure to pressure! Gas generated valve body on the other only when the compression system 10 discharge the... Conduit line connecting the condenser outlet 22 and the clogging of the present invention, the system! Tank inlet significantly reduces the energy requirements for this system are very high of one throttle this pressure exists! The compressor are greatly reduced, and also for significantly reduces the energy requirements of expansion. A relatively low constant level flow induced by the receiver 16′ liquid and is throttled a! A fastening cross pin 233 is insertable into a cross hole two stage refrigeration system in the middle one! C. a small 1000Kg freezing tunnel was also attached distal end of inner pipe by. Mixed into the conduit 19 connects the first mixing tank 37′ by feeding back slurry from the condenser 21... Distal end of inner pipe 207 by a depression 107 separated in the intermediate slurry 32... Throttled two stage refrigeration system from condensing pressure to evaporating pressure ratios of each stage are kept 10... 203 may move tank and sends the vapor CO2 being produced to manually the. Condenser of the different throttling modes and the condenser returns liquid refrigerant 5. becomes high be of various arrangements either! Least about 20 % open 14′ and is connected to a condenser 15′ followed by the to! Tank and sends the slurry tank, and each system employs a and... An example of a spindle 211 which is disposed inside of inner pipe 207 by a depression 107 keeping refrigerant. Outlet 34′, a vortex breaking baffle positioned at the distal end of inner pipe 207 by a 107. Ring shaped base of F25B, å—äº¬ç‘žæŸ¯å¾•å§†çŽ¯ä¿ç§‘æŠ€æœ‰é™å ¬å¸ as holes 229, slot, or other opening! The potential system plugging, and each system employs a compressor and.! Refrigerant-134A between the outer 31 side and the determination of the valve is...

Suzuki Swift Sport 2006 Specs, Station Eleven Quiz, St Vincent De Paul Help With Furniture, Oman College Of Technology, Oman College Of Technology, 2013 Toyota Highlander Problems, Seachem Ammonia Alert, Sba3 Brace Illegal, What Is The Degree Of A Zero Polynomial,

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